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fcoe.c
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linux-6.19.14/drivers/scsi/fcoe/fcoe.c
1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved. 4 * 5 * Maintained at www.Open-FCoE.org 6 */ 7 8#include <linux/module.h> 9#include <linux/spinlock.h> 10#include <linux/netdevice.h> 11#include <linux/etherdevice.h> 12#include <linux/ethtool.h> 13#include <linux/if_ether.h> 14#include <linux/if_vlan.h> 15#include <linux/crc32.h> 16#include <linux/slab.h> 17#include <linux/cpu.h> 18#include <linux/fs.h> 19#include <linux/sysfs.h> 20#include <linux/ctype.h> 21#include <linux/workqueue.h> 22#include <net/dcbnl.h> 23#include <net/dcbevent.h> 24#include <scsi/scsi_tcq.h> 25#include <scsi/scsicam.h> 26#include <scsi/scsi_transport.h> 27#include <scsi/scsi_transport_fc.h> 28#include <net/rtnetlink.h> 29 30#include <scsi/fc/fc_encaps.h> 31#include <scsi/fc/fc_fip.h> 32#include <scsi/fc/fc_fcoe.h> 33 34#include <scsi/libfc.h> 35#include <scsi/fc_frame.h> 36#include <scsi/libfcoe.h> 37 38#include "fcoe.h" 39 40MODULE_AUTHOR("Open-FCoE.org"); 41MODULE_DESCRIPTION("FCoE"); 42MODULE_LICENSE("GPL v2"); 43 44/* Performance tuning parameters for fcoe */ 45static unsigned int fcoe_ddp_min = 4096; 46module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR); 47MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \ 48 "Direct Data Placement (DDP)."); 49 50unsigned int fcoe_debug_logging; 51module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR); 52MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); 53 54static unsigned int fcoe_e_d_tov = 2 * 1000; 55module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR); 56MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000"); 57 58static unsigned int fcoe_r_a_tov = 2 * 2 * 1000; 59module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR); 60MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000"); 61 62static DEFINE_MUTEX(fcoe_config_mutex); 63 64static struct workqueue_struct *fcoe_wq; 65 66/* fcoe host list */ 67/* must only by accessed under the RTNL mutex */ 68static LIST_HEAD(fcoe_hostlist); 69static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu); 70 71/* Function Prototypes */ 72static int fcoe_reset(struct Scsi_Host *); 73static int fcoe_xmit(struct fc_lport *, struct fc_frame *); 74static int fcoe_rcv(struct sk_buff *, struct net_device *, 75 struct packet_type *, struct net_device *); 76static void fcoe_percpu_clean(struct fc_lport *); 77static int fcoe_link_ok(struct fc_lport *); 78 79static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *); 80static int fcoe_hostlist_add(const struct fc_lport *); 81static void fcoe_hostlist_del(const struct fc_lport *); 82 83static int fcoe_device_notification(struct notifier_block *, ulong, void *); 84static void fcoe_dev_setup(void); 85static void fcoe_dev_cleanup(void); 86static struct fcoe_interface 87*fcoe_hostlist_lookup_port(const struct net_device *); 88 89static int fcoe_fip_recv(struct sk_buff *, struct net_device *, 90 struct packet_type *, struct net_device *); 91static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *, 92 struct packet_type *, struct net_device *); 93 94static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *); 95static void fcoe_update_src_mac(struct fc_lport *, u8 *); 96static u8 *fcoe_get_src_mac(struct fc_lport *); 97static void fcoe_destroy_work(struct work_struct *); 98 99static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *, 100 unsigned int); 101static int fcoe_ddp_done(struct fc_lport *, u16); 102static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *, 103 unsigned int); 104static int fcoe_dcb_app_notification(struct notifier_block *notifier, 105 ulong event, void *ptr); 106 107static bool fcoe_match(struct net_device *netdev); 108static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode); 109static int fcoe_destroy(struct net_device *netdev); 110static int fcoe_enable(struct net_device *netdev); 111static int fcoe_disable(struct net_device *netdev); 112 113/* fcoe_syfs control interface handlers */ 114static int fcoe_ctlr_alloc(struct net_device *netdev); 115static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev); 116static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev); 117 118static struct fc_seq *fcoe_elsct_send(struct fc_lport *, 119 u32 did, struct fc_frame *, 120 unsigned int op, 121 void (*resp)(struct fc_seq *, 122 struct fc_frame *, 123 void *), 124 void *, u32 timeout); 125static void fcoe_recv_frame(struct sk_buff *skb); 126 127/* notification function for packets from net device */ 128static struct notifier_block fcoe_notifier = { 129 .notifier_call = fcoe_device_notification, 130}; 131 132/* notification function for DCB events */ 133static struct notifier_block dcb_notifier = { 134 .notifier_call = fcoe_dcb_app_notification, 135}; 136 137static struct scsi_transport_template *fcoe_nport_scsi_transport; 138static struct scsi_transport_template *fcoe_vport_scsi_transport; 139 140static int fcoe_vport_destroy(struct fc_vport *); 141static int fcoe_vport_create(struct fc_vport *, bool disabled); 142static int fcoe_vport_disable(struct fc_vport *, bool disable); 143static void fcoe_set_vport_symbolic_name(struct fc_vport *); 144static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *); 145static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *); 146static void fcoe_vport_remove(struct fc_lport *); 147 148static struct fcoe_sysfs_function_template fcoe_sysfs_templ = { 149 .set_fcoe_ctlr_mode = fcoe_ctlr_mode, 150 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled, 151 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb, 152 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb, 153 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb, 154 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb, 155 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb, 156 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb, 157 158 .get_fcoe_fcf_selected = fcoe_fcf_get_selected, 159 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id, 160}; 161 162static struct libfc_function_template fcoe_libfc_fcn_templ = { 163 .frame_send = fcoe_xmit, 164 .ddp_setup = fcoe_ddp_setup, 165 .ddp_done = fcoe_ddp_done, 166 .ddp_target = fcoe_ddp_target, 167 .elsct_send = fcoe_elsct_send, 168 .get_lesb = fcoe_get_lesb, 169 .lport_set_port_id = fcoe_set_port_id, 170}; 171 172static struct fc_function_template fcoe_nport_fc_functions = { 173 .show_host_node_name = 1, 174 .show_host_port_name = 1, 175 .show_host_supported_classes = 1, 176 .show_host_supported_fc4s = 1, 177 .show_host_active_fc4s = 1, 178 .show_host_maxframe_size = 1, 179 .show_host_serial_number = 1, 180 .show_host_manufacturer = 1, 181 .show_host_model = 1, 182 .show_host_model_description = 1, 183 .show_host_hardware_version = 1, 184 .show_host_driver_version = 1, 185 .show_host_firmware_version = 1, 186 .show_host_optionrom_version = 1, 187 188 .show_host_port_id = 1, 189 .show_host_supported_speeds = 1, 190 .get_host_speed = fc_get_host_speed, 191 .show_host_speed = 1, 192 .show_host_port_type = 1, 193 .get_host_port_state = fc_get_host_port_state, 194 .show_host_port_state = 1, 195 .show_host_symbolic_name = 1, 196 197 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 198 .show_rport_maxframe_size = 1, 199 .show_rport_supported_classes = 1, 200 201 .show_host_fabric_name = 1, 202 .show_starget_node_name = 1, 203 .show_starget_port_name = 1, 204 .show_starget_port_id = 1, 205 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 206 .show_rport_dev_loss_tmo = 1, 207 .get_fc_host_stats = fc_get_host_stats, 208 .issue_fc_host_lip = fcoe_reset, 209 210 .terminate_rport_io = fc_rport_terminate_io, 211 212 .vport_create = fcoe_vport_create, 213 .vport_delete = fcoe_vport_destroy, 214 .vport_disable = fcoe_vport_disable, 215 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name, 216 217 .bsg_request = fc_lport_bsg_request, 218}; 219 220static struct fc_function_template fcoe_vport_fc_functions = { 221 .show_host_node_name = 1, 222 .show_host_port_name = 1, 223 .show_host_supported_classes = 1, 224 .show_host_supported_fc4s = 1, 225 .show_host_active_fc4s = 1, 226 .show_host_maxframe_size = 1, 227 .show_host_serial_number = 1, 228 .show_host_manufacturer = 1, 229 .show_host_model = 1, 230 .show_host_model_description = 1, 231 .show_host_hardware_version = 1, 232 .show_host_driver_version = 1, 233 .show_host_firmware_version = 1, 234 .show_host_optionrom_version = 1, 235 236 .show_host_port_id = 1, 237 .show_host_supported_speeds = 1, 238 .get_host_speed = fc_get_host_speed, 239 .show_host_speed = 1, 240 .show_host_port_type = 1, 241 .get_host_port_state = fc_get_host_port_state, 242 .show_host_port_state = 1, 243 .show_host_symbolic_name = 1, 244 245 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 246 .show_rport_maxframe_size = 1, 247 .show_rport_supported_classes = 1, 248 249 .show_host_fabric_name = 1, 250 .show_starget_node_name = 1, 251 .show_starget_port_name = 1, 252 .show_starget_port_id = 1, 253 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo, 254 .show_rport_dev_loss_tmo = 1, 255 .get_fc_host_stats = fc_get_host_stats, 256 .issue_fc_host_lip = fcoe_reset, 257 258 .terminate_rport_io = fc_rport_terminate_io, 259 260 .bsg_request = fc_lport_bsg_request, 261}; 262 263static const struct scsi_host_template fcoe_shost_template = { 264 .module = THIS_MODULE, 265 .name = "FCoE Driver", 266 .proc_name = FCOE_NAME, 267 .queuecommand = fc_queuecommand, 268 .eh_timed_out = fc_eh_timed_out, 269 .eh_abort_handler = fc_eh_abort, 270 .eh_device_reset_handler = fc_eh_device_reset, 271 .eh_host_reset_handler = fc_eh_host_reset, 272 .sdev_init = fc_sdev_init, 273 .change_queue_depth = scsi_change_queue_depth, 274 .this_id = -1, 275 .cmd_per_lun = 3, 276 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS, 277 .sg_tablesize = SG_ALL, 278 .max_sectors = 0xffff, 279 .track_queue_depth = 1, 280 .cmd_size = sizeof(struct libfc_cmd_priv), 281}; 282 283/** 284 * fcoe_interface_setup() - Setup a FCoE interface 285 * @fcoe: The new FCoE interface 286 * @netdev: The net device that the fcoe interface is on 287 * 288 * Returns : 0 for success 289 * Locking: must be called with the RTNL mutex held 290 */ 291static int fcoe_interface_setup(struct fcoe_interface *fcoe, 292 struct net_device *netdev) 293{ 294 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 295 struct netdev_hw_addr *ha; 296 struct net_device *real_dev; 297 static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC; 298 const struct net_device_ops *ops; 299 300 fcoe->netdev = netdev; 301 302 /* Let LLD initialize for FCoE */ 303 ops = netdev->netdev_ops; 304 if (ops->ndo_fcoe_enable) { 305 if (ops->ndo_fcoe_enable(netdev)) 306 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE" 307 " specific feature for LLD.\n"); 308 } 309 310 /* Do not support for bonding device */ 311 if (netif_is_bond_master(netdev)) { 312 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n"); 313 return -EOPNOTSUPP; 314 } 315 316 /* look for SAN MAC address, if multiple SAN MACs exist, only 317 * use the first one for SPMA */ 318 real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev; 319 fcoe->realdev = real_dev; 320 rcu_read_lock(); 321 for_each_dev_addr(real_dev, ha) { 322 if ((ha->type == NETDEV_HW_ADDR_T_SAN) && 323 (is_valid_ether_addr(ha->addr))) { 324 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN); 325 fip->spma = 1; 326 break; 327 } 328 } 329 rcu_read_unlock(); 330 331 /* setup Source Mac Address */ 332 if (!fip->spma) 333 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len); 334 335 /* 336 * Add FCoE MAC address as second unicast MAC address 337 * or enter promiscuous mode if not capable of listening 338 * for multiple unicast MACs. 339 */ 340 dev_uc_add(netdev, flogi_maddr); 341 if (fip->spma) 342 dev_uc_add(netdev, fip->ctl_src_addr); 343 if (fip->mode == FIP_MODE_VN2VN) { 344 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS); 345 dev_mc_add(netdev, FIP_ALL_P2P_MACS); 346 } else 347 dev_mc_add(netdev, FIP_ALL_ENODE_MACS); 348 349 /* 350 * setup the receive function from ethernet driver 351 * on the ethertype for the given device 352 */ 353 fcoe->fcoe_packet_type.func = fcoe_rcv; 354 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE); 355 fcoe->fcoe_packet_type.dev = netdev; 356 dev_add_pack(&fcoe->fcoe_packet_type); 357 358 fcoe->fip_packet_type.func = fcoe_fip_recv; 359 fcoe->fip_packet_type.type = htons(ETH_P_FIP); 360 fcoe->fip_packet_type.dev = netdev; 361 dev_add_pack(&fcoe->fip_packet_type); 362 363 if (netdev != real_dev) { 364 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv; 365 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP); 366 fcoe->fip_vlan_packet_type.dev = real_dev; 367 dev_add_pack(&fcoe->fip_vlan_packet_type); 368 } 369 return 0; 370} 371 372/** 373 * fcoe_interface_create() - Create a FCoE interface on a net device 374 * @netdev: The net device to create the FCoE interface on 375 * @fip_mode: The mode to use for FIP 376 * 377 * Returns: pointer to a struct fcoe_interface or NULL on error 378 */ 379static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev, 380 enum fip_mode fip_mode) 381{ 382 struct fcoe_ctlr_device *ctlr_dev; 383 struct fcoe_ctlr *ctlr; 384 struct fcoe_interface *fcoe; 385 int size; 386 int err; 387 388 if (!try_module_get(THIS_MODULE)) { 389 FCOE_NETDEV_DBG(netdev, 390 "Could not get a reference to the module\n"); 391 fcoe = ERR_PTR(-EBUSY); 392 goto out; 393 } 394 395 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface); 396 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ, 397 size); 398 if (!ctlr_dev) { 399 FCOE_DBG("Failed to add fcoe_ctlr_device\n"); 400 fcoe = ERR_PTR(-ENOMEM); 401 goto out_putmod; 402 } 403 404 ctlr = fcoe_ctlr_device_priv(ctlr_dev); 405 ctlr->cdev = ctlr_dev; 406 fcoe = fcoe_ctlr_priv(ctlr); 407 408 dev_hold(netdev); 409 410 /* 411 * Initialize FIP. 412 */ 413 fcoe_ctlr_init(ctlr, fip_mode); 414 ctlr->send = fcoe_fip_send; 415 ctlr->update_mac = fcoe_update_src_mac; 416 ctlr->get_src_addr = fcoe_get_src_mac; 417 418 err = fcoe_interface_setup(fcoe, netdev); 419 if (err) { 420 fcoe_ctlr_destroy(ctlr); 421 fcoe_ctlr_device_delete(ctlr_dev); 422 dev_put(netdev); 423 fcoe = ERR_PTR(err); 424 goto out_putmod; 425 } 426 427 goto out; 428 429out_putmod: 430 module_put(THIS_MODULE); 431out: 432 return fcoe; 433} 434 435/** 436 * fcoe_interface_remove() - remove FCoE interface from netdev 437 * @fcoe: The FCoE interface to be cleaned up 438 * 439 * Caller must be holding the RTNL mutex 440 */ 441static void fcoe_interface_remove(struct fcoe_interface *fcoe) 442{ 443 struct net_device *netdev = fcoe->netdev; 444 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 445 static const u8 flogi_maddr[ETH_ALEN] = FC_FCOE_FLOGI_MAC; 446 const struct net_device_ops *ops; 447 448 /* 449 * Don't listen for Ethernet packets anymore. 450 * synchronize_net() ensures that the packet handlers are not running 451 * on another CPU. dev_remove_pack() would do that, this calls the 452 * unsyncronized version __dev_remove_pack() to avoid multiple delays. 453 */ 454 __dev_remove_pack(&fcoe->fcoe_packet_type); 455 __dev_remove_pack(&fcoe->fip_packet_type); 456 if (netdev != fcoe->realdev) 457 __dev_remove_pack(&fcoe->fip_vlan_packet_type); 458 synchronize_net(); 459 460 /* Delete secondary MAC addresses */ 461 dev_uc_del(netdev, flogi_maddr); 462 if (fip->spma) 463 dev_uc_del(netdev, fip->ctl_src_addr); 464 if (fip->mode == FIP_MODE_VN2VN) { 465 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS); 466 dev_mc_del(netdev, FIP_ALL_P2P_MACS); 467 } else 468 dev_mc_del(netdev, FIP_ALL_ENODE_MACS); 469 470 /* Tell the LLD we are done w/ FCoE */ 471 ops = netdev->netdev_ops; 472 if (ops->ndo_fcoe_disable) { 473 if (ops->ndo_fcoe_disable(netdev)) 474 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE" 475 " specific feature for LLD.\n"); 476 } 477 fcoe->removed = 1; 478} 479 480 481/** 482 * fcoe_interface_cleanup() - Clean up a FCoE interface 483 * @fcoe: The FCoE interface to be cleaned up 484 */ 485static void fcoe_interface_cleanup(struct fcoe_interface *fcoe) 486{ 487 struct net_device *netdev = fcoe->netdev; 488 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 489 490 /* Release the self-reference taken during fcoe_interface_create() */ 491 /* tear-down the FCoE controller */ 492 fcoe_ctlr_destroy(fip); 493 scsi_host_put(fip->lp->host); 494 dev_put(netdev); 495 module_put(THIS_MODULE); 496} 497 498/** 499 * fcoe_fip_recv() - Handler for received FIP frames 500 * @skb: The receive skb 501 * @netdev: The associated net device 502 * @ptype: The packet_type structure which was used to register this handler 503 * @orig_dev: The original net_device the skb was received on. 504 * (in case dev is a bond) 505 * 506 * Returns: 0 for success 507 */ 508static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev, 509 struct packet_type *ptype, 510 struct net_device *orig_dev) 511{ 512 struct fcoe_interface *fcoe; 513 struct fcoe_ctlr *ctlr; 514 515 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type); 516 ctlr = fcoe_to_ctlr(fcoe); 517 fcoe_ctlr_recv(ctlr, skb); 518 return 0; 519} 520 521/** 522 * fcoe_fip_vlan_recv() - Handler for received FIP VLAN discovery frames 523 * @skb: The receive skb 524 * @netdev: The associated net device 525 * @ptype: The packet_type structure which was used to register this handler 526 * @orig_dev: The original net_device the skb was received on. 527 * (in case dev is a bond) 528 * 529 * Returns: 0 for success 530 */ 531static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev, 532 struct packet_type *ptype, 533 struct net_device *orig_dev) 534{ 535 struct fcoe_interface *fcoe; 536 struct fcoe_ctlr *ctlr; 537 538 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type); 539 ctlr = fcoe_to_ctlr(fcoe); 540 fcoe_ctlr_recv(ctlr, skb); 541 return 0; 542} 543 544/** 545 * fcoe_port_send() - Send an Ethernet-encapsulated FIP/FCoE frame 546 * @port: The FCoE port 547 * @skb: The FIP/FCoE packet to be sent 548 */ 549static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb) 550{ 551 if (port->fcoe_pending_queue.qlen) 552 fcoe_check_wait_queue(port->lport, skb); 553 else if (fcoe_start_io(skb)) 554 fcoe_check_wait_queue(port->lport, skb); 555} 556 557/** 558 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame 559 * @fip: The FCoE controller 560 * @skb: The FIP packet to be sent 561 */ 562static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb) 563{ 564 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip); 565 struct fip_frame { 566 struct ethhdr eth; 567 struct fip_header fip; 568 } __packed *frame; 569 570 /* 571 * Use default VLAN for FIP VLAN discovery protocol 572 */ 573 frame = (struct fip_frame *)skb->data; 574 if (ntohs(frame->eth.h_proto) == ETH_P_FIP && 575 ntohs(frame->fip.fip_op) == FIP_OP_VLAN && 576 fcoe->realdev != fcoe->netdev) 577 skb->dev = fcoe->realdev; 578 else 579 skb->dev = fcoe->netdev; 580 fcoe_port_send(lport_priv(fip->lp), skb); 581} 582 583/** 584 * fcoe_update_src_mac() - Update the Ethernet MAC filters 585 * @lport: The local port to update the source MAC on 586 * @addr: Unicast MAC address to add 587 * 588 * Remove any previously-set unicast MAC filter. 589 * Add secondary FCoE MAC address filter for our OUI. 590 */ 591static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr) 592{ 593 struct fcoe_port *port = lport_priv(lport); 594 struct fcoe_interface *fcoe = port->priv; 595 596 if (!is_zero_ether_addr(port->data_src_addr)) 597 dev_uc_del(fcoe->netdev, port->data_src_addr); 598 if (!is_zero_ether_addr(addr)) 599 dev_uc_add(fcoe->netdev, addr); 600 memcpy(port->data_src_addr, addr, ETH_ALEN); 601} 602 603/** 604 * fcoe_get_src_mac() - return the Ethernet source address for an lport 605 * @lport: libfc lport 606 */ 607static u8 *fcoe_get_src_mac(struct fc_lport *lport) 608{ 609 struct fcoe_port *port = lport_priv(lport); 610 611 return port->data_src_addr; 612} 613 614/** 615 * fcoe_lport_config() - Set up a local port 616 * @lport: The local port to be setup 617 * 618 * Returns: 0 for success 619 */ 620static int fcoe_lport_config(struct fc_lport *lport) 621{ 622 lport->link_up = 0; 623 lport->qfull = 0; 624 lport->max_retry_count = 3; 625 lport->max_rport_retry_count = 3; 626 lport->e_d_tov = fcoe_e_d_tov; 627 lport->r_a_tov = fcoe_r_a_tov; 628 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 629 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL); 630 lport->does_npiv = 1; 631 632 fc_lport_init_stats(lport); 633 634 /* lport fc_lport related configuration */ 635 fc_lport_config(lport); 636 637 /* offload related configuration */ 638 lport->crc_offload = 0; 639 lport->seq_offload = 0; 640 lport->lro_enabled = 0; 641 lport->lro_xid = 0; 642 lport->lso_max = 0; 643 644 return 0; 645} 646 647/* 648 * fcoe_netdev_features_change - Updates the lport's offload flags based 649 * on the LLD netdev's FCoE feature flags 650 */ 651static void fcoe_netdev_features_change(struct fc_lport *lport, 652 struct net_device *netdev) 653{ 654 mutex_lock(&lport->lp_mutex); 655 656 if (netdev->features & NETIF_F_SG) 657 lport->sg_supp = 1; 658 else 659 lport->sg_supp = 0; 660 661 if (netdev->features & NETIF_F_FCOE_CRC) { 662 lport->crc_offload = 1; 663 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n"); 664 } else { 665 lport->crc_offload = 0; 666 } 667 668 if (netdev->features & NETIF_F_FSO) { 669 lport->seq_offload = 1; 670 lport->lso_max = min(netdev->gso_max_size, GSO_LEGACY_MAX_SIZE); 671 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n", 672 lport->lso_max); 673 } else { 674 lport->seq_offload = 0; 675 lport->lso_max = 0; 676 } 677 678 if (netdev->fcoe_ddp_xid) { 679 lport->lro_enabled = 1; 680 lport->lro_xid = netdev->fcoe_ddp_xid; 681 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n", 682 lport->lro_xid); 683 } else { 684 lport->lro_enabled = 0; 685 lport->lro_xid = 0; 686 } 687 688 mutex_unlock(&lport->lp_mutex); 689} 690 691/** 692 * fcoe_netdev_config() - Set up net devive for SW FCoE 693 * @lport: The local port that is associated with the net device 694 * @netdev: The associated net device 695 * 696 * Must be called after fcoe_lport_config() as it will use local port mutex 697 * 698 * Returns: 0 for success 699 */ 700static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev) 701{ 702 u32 mfs; 703 u64 wwnn, wwpn; 704 struct fcoe_interface *fcoe; 705 struct fcoe_ctlr *ctlr; 706 struct fcoe_port *port; 707 708 /* Setup lport private data to point to fcoe softc */ 709 port = lport_priv(lport); 710 fcoe = port->priv; 711 ctlr = fcoe_to_ctlr(fcoe); 712 713 /* Figure out the VLAN ID, if any */ 714 if (is_vlan_dev(netdev)) 715 lport->vlan = vlan_dev_vlan_id(netdev); 716 else 717 lport->vlan = 0; 718 719 /* 720 * Determine max frame size based on underlying device and optional 721 * user-configured limit. If the MFS is too low, fcoe_link_ok() 722 * will return 0, so do this first. 723 */ 724 mfs = netdev->mtu; 725 if (netdev->fcoe_mtu) { 726 mfs = FCOE_MTU; 727 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs); 728 } 729 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof)); 730 if (fc_set_mfs(lport, mfs)) 731 return -EINVAL; 732 733 /* offload features support */ 734 fcoe_netdev_features_change(lport, netdev); 735 736 skb_queue_head_init(&port->fcoe_pending_queue); 737 port->fcoe_pending_queue_active = 0; 738 timer_setup(&port->timer, fcoe_queue_timer, 0); 739 740 fcoe_link_speed_update(lport); 741 742 if (!lport->vport) { 743 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN)) 744 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0); 745 fc_set_wwnn(lport, wwnn); 746 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN)) 747 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 748 2, 0); 749 fc_set_wwpn(lport, wwpn); 750 } 751 752 return 0; 753} 754 755/** 756 * fcoe_shost_config() - Set up the SCSI host associated with a local port 757 * @lport: The local port 758 * @dev: The device associated with the SCSI host 759 * 760 * Must be called after fcoe_lport_config() and fcoe_netdev_config() 761 * 762 * Returns: 0 for success 763 */ 764static int fcoe_shost_config(struct fc_lport *lport, struct device *dev) 765{ 766 int rc = 0; 767 768 /* lport scsi host config */ 769 lport->host->max_lun = FCOE_MAX_LUN; 770 lport->host->max_id = FCOE_MAX_FCP_TARGET; 771 lport->host->max_channel = 0; 772 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN; 773 774 if (lport->vport) 775 lport->host->transportt = fcoe_vport_scsi_transport; 776 else 777 lport->host->transportt = fcoe_nport_scsi_transport; 778 779 /* add the new host to the SCSI-ml */ 780 rc = scsi_add_host(lport->host, dev); 781 if (rc) { 782 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: " 783 "error on scsi_add_host\n"); 784 return rc; 785 } 786 787 if (!lport->vport) 788 fc_host_max_npiv_vports(lport->host) = USHRT_MAX; 789 790 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 791 "%s v%s over %s", FCOE_NAME, FCOE_VERSION, 792 fcoe_netdev(lport)->name); 793 794 return 0; 795} 796 797 798/** 799 * fcoe_fdmi_info() - Get FDMI related info from net devive for SW FCoE 800 * @lport: The local port that is associated with the net device 801 * @netdev: The associated net device 802 * 803 * Must be called after fcoe_shost_config() as it will use local port mutex 804 * 805 */ 806static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev) 807{ 808 struct fcoe_interface *fcoe; 809 struct fcoe_port *port; 810 struct net_device *realdev; 811 int rc; 812 813 port = lport_priv(lport); 814 fcoe = port->priv; 815 realdev = fcoe->realdev; 816 817 /* No FDMI state m/c for NPIV ports */ 818 if (lport->vport) 819 return; 820 821 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) { 822 struct netdev_fcoe_hbainfo *fdmi; 823 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL); 824 if (!fdmi) 825 return; 826 827 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev, 828 fdmi); 829 if (rc) { 830 printk(KERN_INFO "fcoe: Failed to retrieve FDMI " 831 "information from netdev.\n"); 832 return; 833 } 834 835 snprintf(fc_host_serial_number(lport->host), 836 FC_SERIAL_NUMBER_SIZE, 837 "%s", 838 fdmi->serial_number); 839 snprintf(fc_host_manufacturer(lport->host), 840 FC_SERIAL_NUMBER_SIZE, 841 "%s", 842 fdmi->manufacturer); 843 snprintf(fc_host_model(lport->host), 844 FC_SYMBOLIC_NAME_SIZE, 845 "%s", 846 fdmi->model); 847 snprintf(fc_host_model_description(lport->host), 848 FC_SYMBOLIC_NAME_SIZE, 849 "%s", 850 fdmi->model_description); 851 snprintf(fc_host_hardware_version(lport->host), 852 FC_VERSION_STRING_SIZE, 853 "%s", 854 fdmi->hardware_version); 855 snprintf(fc_host_driver_version(lport->host), 856 FC_VERSION_STRING_SIZE, 857 "%s", 858 fdmi->driver_version); 859 snprintf(fc_host_optionrom_version(lport->host), 860 FC_VERSION_STRING_SIZE, 861 "%s", 862 fdmi->optionrom_version); 863 snprintf(fc_host_firmware_version(lport->host), 864 FC_VERSION_STRING_SIZE, 865 "%s", 866 fdmi->firmware_version); 867 868 /* Enable FDMI lport states */ 869 lport->fdmi_enabled = 1; 870 kfree(fdmi); 871 } else { 872 lport->fdmi_enabled = 0; 873 printk(KERN_INFO "fcoe: No FDMI support.\n"); 874 } 875} 876 877/** 878 * fcoe_oem_match() - The match routine for the offloaded exchange manager 879 * @fp: The I/O frame 880 * 881 * This routine will be associated with an exchange manager (EM). When 882 * the libfc exchange handling code is looking for an EM to use it will 883 * call this routine and pass it the frame that it wishes to send. This 884 * routine will return True if the associated EM is to be used and False 885 * if the echange code should continue looking for an EM. 886 * 887 * The offload EM that this routine is associated with will handle any 888 * packets that are for SCSI read requests. 889 * 890 * This has been enhanced to work when FCoE stack is operating in target 891 * mode. 892 * 893 * Returns: True for read types I/O, otherwise returns false. 894 */ 895static bool fcoe_oem_match(struct fc_frame *fp) 896{ 897 struct fc_frame_header *fh = fc_frame_header_get(fp); 898 struct fcp_cmnd *fcp; 899 900 if (fc_fcp_is_read(fr_fsp(fp)) && 901 (fr_fsp(fp)->data_len > fcoe_ddp_min)) 902 return true; 903 else if ((fr_fsp(fp) == NULL) && 904 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) && 905 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) { 906 fcp = fc_frame_payload_get(fp, sizeof(*fcp)); 907 if ((fcp->fc_flags & FCP_CFL_WRDATA) && 908 (ntohl(fcp->fc_dl) > fcoe_ddp_min)) 909 return true; 910 } 911 return false; 912} 913 914/** 915 * fcoe_em_config() - Allocate and configure an exchange manager 916 * @lport: The local port that the new EM will be associated with 917 * 918 * Returns: 0 on success 919 */ 920static inline int fcoe_em_config(struct fc_lport *lport) 921{ 922 struct fcoe_port *port = lport_priv(lport); 923 struct fcoe_interface *fcoe = port->priv; 924 struct fcoe_interface *oldfcoe = NULL; 925 struct net_device *old_real_dev, *cur_real_dev; 926 u16 min_xid = FCOE_MIN_XID; 927 u16 max_xid = FCOE_MAX_XID; 928 929 /* 930 * Check if need to allocate an em instance for 931 * offload exchange ids to be shared across all VN_PORTs/lport. 932 */ 933 if (!lport->lro_enabled || !lport->lro_xid || 934 (lport->lro_xid >= max_xid)) { 935 lport->lro_xid = 0; 936 goto skip_oem; 937 } 938 939 /* 940 * Reuse existing offload em instance in case 941 * it is already allocated on real eth device 942 */ 943 if (is_vlan_dev(fcoe->netdev)) 944 cur_real_dev = vlan_dev_real_dev(fcoe->netdev); 945 else 946 cur_real_dev = fcoe->netdev; 947 948 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) { 949 if (is_vlan_dev(oldfcoe->netdev)) 950 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev); 951 else 952 old_real_dev = oldfcoe->netdev; 953 954 if (cur_real_dev == old_real_dev) { 955 fcoe->oem = oldfcoe->oem; 956 break; 957 } 958 } 959 960 if (fcoe->oem) { 961 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) { 962 printk(KERN_ERR "fcoe_em_config: failed to add " 963 "offload em:%p on interface:%s\n", 964 fcoe->oem, fcoe->netdev->name); 965 return -ENOMEM; 966 } 967 } else { 968 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3, 969 FCOE_MIN_XID, lport->lro_xid, 970 fcoe_oem_match); 971 if (!fcoe->oem) { 972 printk(KERN_ERR "fcoe_em_config: failed to allocate " 973 "em for offload exches on interface:%s\n", 974 fcoe->netdev->name); 975 return -ENOMEM; 976 } 977 } 978 979 /* 980 * Exclude offload EM xid range from next EM xid range. 981 */ 982 min_xid += lport->lro_xid + 1; 983 984skip_oem: 985 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) { 986 printk(KERN_ERR "fcoe_em_config: failed to " 987 "allocate em on interface %s\n", fcoe->netdev->name); 988 return -ENOMEM; 989 } 990 991 return 0; 992} 993 994/** 995 * fcoe_if_destroy() - Tear down a SW FCoE instance 996 * @lport: The local port to be destroyed 997 * 998 * Locking: Must be called with the RTNL mutex held. 999 * 1000 */ 1001static void fcoe_if_destroy(struct fc_lport *lport) 1002{ 1003 struct fcoe_port *port = lport_priv(lport); 1004 struct fcoe_interface *fcoe = port->priv; 1005 struct net_device *netdev = fcoe->netdev; 1006 1007 FCOE_NETDEV_DBG(netdev, "Destroying interface\n"); 1008 1009 /* Logout of the fabric */ 1010 fc_fabric_logoff(lport); 1011 1012 /* Cleanup the fc_lport */ 1013 fc_lport_destroy(lport); 1014 1015 /* Stop the transmit retry timer */ 1016 timer_delete_sync(&port->timer); 1017 1018 /* Free existing transmit skbs */ 1019 fcoe_clean_pending_queue(lport); 1020 1021 if (!is_zero_ether_addr(port->data_src_addr)) 1022 dev_uc_del(netdev, port->data_src_addr); 1023 if (lport->vport) 1024 synchronize_net(); 1025 else 1026 fcoe_interface_remove(fcoe); 1027 1028 /* Free queued packets for the per-CPU receive threads */ 1029 fcoe_percpu_clean(lport); 1030 1031 /* Detach from the scsi-ml */ 1032 fc_remove_host(lport->host); 1033 scsi_remove_host(lport->host); 1034 1035 /* Destroy lport scsi_priv */ 1036 fc_fcp_destroy(lport); 1037 1038 /* There are no more rports or I/O, free the EM */ 1039 fc_exch_mgr_free(lport); 1040 1041 /* Free memory used by statistical counters */ 1042 fc_lport_free_stats(lport); 1043 1044 /* 1045 * Release the Scsi_Host for vport but hold on to 1046 * master lport until it fcoe interface fully cleaned-up. 1047 */ 1048 if (lport->vport) 1049 scsi_host_put(lport->host); 1050} 1051 1052/** 1053 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device 1054 * @lport: The local port to setup DDP for 1055 * @xid: The exchange ID for this DDP transfer 1056 * @sgl: The scatterlist describing this transfer 1057 * @sgc: The number of sg items 1058 * 1059 * Returns: 0 if the DDP context was not configured 1060 */ 1061static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid, 1062 struct scatterlist *sgl, unsigned int sgc) 1063{ 1064 struct net_device *netdev = fcoe_netdev(lport); 1065 1066 if (netdev->netdev_ops->ndo_fcoe_ddp_setup) 1067 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev, 1068 xid, sgl, 1069 sgc); 1070 1071 return 0; 1072} 1073 1074/** 1075 * fcoe_ddp_target() - Call a LLD's ddp_target through the net device 1076 * @lport: The local port to setup DDP for 1077 * @xid: The exchange ID for this DDP transfer 1078 * @sgl: The scatterlist describing this transfer 1079 * @sgc: The number of sg items 1080 * 1081 * Returns: 0 if the DDP context was not configured 1082 */ 1083static int fcoe_ddp_target(struct fc_lport *lport, u16 xid, 1084 struct scatterlist *sgl, unsigned int sgc) 1085{ 1086 struct net_device *netdev = fcoe_netdev(lport); 1087 1088 if (netdev->netdev_ops->ndo_fcoe_ddp_target) 1089 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid, 1090 sgl, sgc); 1091 1092 return 0; 1093} 1094 1095 1096/** 1097 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device 1098 * @lport: The local port to complete DDP on 1099 * @xid: The exchange ID for this DDP transfer 1100 * 1101 * Returns: the length of data that have been completed by DDP 1102 */ 1103static int fcoe_ddp_done(struct fc_lport *lport, u16 xid) 1104{ 1105 struct net_device *netdev = fcoe_netdev(lport); 1106 1107 if (netdev->netdev_ops->ndo_fcoe_ddp_done) 1108 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid); 1109 return 0; 1110} 1111 1112/** 1113 * fcoe_if_create() - Create a FCoE instance on an interface 1114 * @fcoe: The FCoE interface to create a local port on 1115 * @parent: The device pointer to be the parent in sysfs for the SCSI host 1116 * @npiv: Indicates if the port is a vport or not 1117 * 1118 * Creates a fc_lport instance and a Scsi_Host instance and configure them. 1119 * 1120 * Returns: The allocated fc_lport or an error pointer 1121 */ 1122static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe, 1123 struct device *parent, int npiv) 1124{ 1125 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1126 struct net_device *netdev = fcoe->netdev; 1127 struct fc_lport *lport, *n_port; 1128 struct fcoe_port *port; 1129 struct Scsi_Host *shost; 1130 int rc; 1131 /* 1132 * parent is only a vport if npiv is 1, 1133 * but we'll only use vport in that case so go ahead and set it 1134 */ 1135 struct fc_vport *vport = dev_to_vport(parent); 1136 1137 FCOE_NETDEV_DBG(netdev, "Create Interface\n"); 1138 1139 if (!npiv) 1140 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port)); 1141 else 1142 lport = libfc_vport_create(vport, sizeof(*port)); 1143 1144 if (!lport) { 1145 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n"); 1146 rc = -ENOMEM; 1147 goto out; 1148 } 1149 port = lport_priv(lport); 1150 port->lport = lport; 1151 port->priv = fcoe; 1152 port->get_netdev = fcoe_netdev; 1153 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH; 1154 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH; 1155 INIT_WORK(&port->destroy_work, fcoe_destroy_work); 1156 1157 /* 1158 * Need to add the lport to the hostlist 1159 * so we catch NETDEV_CHANGE events. 1160 */ 1161 fcoe_hostlist_add(lport); 1162 1163 /* configure a fc_lport including the exchange manager */ 1164 rc = fcoe_lport_config(lport); 1165 if (rc) { 1166 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the " 1167 "interface\n"); 1168 goto out_host_put; 1169 } 1170 1171 if (npiv) { 1172 FCOE_NETDEV_DBG(netdev, "Setting vport names, " 1173 "%16.16llx %16.16llx\n", 1174 vport->node_name, vport->port_name); 1175 fc_set_wwnn(lport, vport->node_name); 1176 fc_set_wwpn(lport, vport->port_name); 1177 } 1178 1179 /* configure lport network properties */ 1180 rc = fcoe_netdev_config(lport, netdev); 1181 if (rc) { 1182 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the " 1183 "interface\n"); 1184 goto out_lp_destroy; 1185 } 1186 1187 /* configure lport scsi host properties */ 1188 rc = fcoe_shost_config(lport, parent); 1189 if (rc) { 1190 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the " 1191 "interface\n"); 1192 goto out_lp_destroy; 1193 } 1194 1195 /* Initialize the library */ 1196 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1); 1197 if (rc) { 1198 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the " 1199 "interface\n"); 1200 goto out_lp_destroy; 1201 } 1202 1203 /* Initialized FDMI information */ 1204 fcoe_fdmi_info(lport, netdev); 1205 1206 /* 1207 * fcoe_em_alloc() and fcoe_hostlist_add() both 1208 * need to be atomic with respect to other changes to the 1209 * hostlist since fcoe_em_alloc() looks for an existing EM 1210 * instance on host list updated by fcoe_hostlist_add(). 1211 * 1212 * This is currently handled through the fcoe_config_mutex 1213 * begin held. 1214 */ 1215 if (!npiv) 1216 /* lport exch manager allocation */ 1217 rc = fcoe_em_config(lport); 1218 else { 1219 shost = vport_to_shost(vport); 1220 n_port = shost_priv(shost); 1221 rc = fc_exch_mgr_list_clone(n_port, lport); 1222 } 1223 1224 if (rc) { 1225 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n"); 1226 goto out_lp_destroy; 1227 } 1228 1229 return lport; 1230 1231out_lp_destroy: 1232 fc_exch_mgr_free(lport); 1233out_host_put: 1234 fcoe_hostlist_del(lport); 1235 scsi_host_put(lport->host); 1236out: 1237 return ERR_PTR(rc); 1238} 1239 1240/** 1241 * fcoe_if_init() - Initialization routine for fcoe.ko 1242 * 1243 * Attaches the SW FCoE transport to the FC transport 1244 * 1245 * Returns: 0 on success 1246 */ 1247static int __init fcoe_if_init(void) 1248{ 1249 /* attach to scsi transport */ 1250 fcoe_nport_scsi_transport = 1251 fc_attach_transport(&fcoe_nport_fc_functions); 1252 if (!fcoe_nport_scsi_transport) 1253 goto err; 1254 1255 fcoe_vport_scsi_transport = 1256 fc_attach_transport(&fcoe_vport_fc_functions); 1257 if (!fcoe_vport_scsi_transport) 1258 goto err_vport; 1259 1260 return 0; 1261 1262err_vport: 1263 fc_release_transport(fcoe_nport_scsi_transport); 1264err: 1265 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n"); 1266 return -ENODEV; 1267} 1268 1269/** 1270 * fcoe_if_exit() - Tear down fcoe.ko 1271 * 1272 * Detaches the SW FCoE transport from the FC transport 1273 * 1274 * Returns: 0 on success 1275 */ 1276static int __exit fcoe_if_exit(void) 1277{ 1278 fc_release_transport(fcoe_nport_scsi_transport); 1279 fc_release_transport(fcoe_vport_scsi_transport); 1280 fcoe_nport_scsi_transport = NULL; 1281 fcoe_vport_scsi_transport = NULL; 1282 return 0; 1283} 1284 1285static void fcoe_thread_cleanup_local(unsigned int cpu) 1286{ 1287 struct page *crc_eof; 1288 struct fcoe_percpu_s *p; 1289 1290 p = per_cpu_ptr(&fcoe_percpu, cpu); 1291 spin_lock_bh(&p->fcoe_rx_list.lock); 1292 crc_eof = p->crc_eof_page; 1293 p->crc_eof_page = NULL; 1294 p->crc_eof_offset = 0; 1295 spin_unlock_bh(&p->fcoe_rx_list.lock); 1296 1297 if (crc_eof) 1298 put_page(crc_eof); 1299 flush_work(&p->work); 1300} 1301 1302/** 1303 * fcoe_rcv() - Receive packets from a net device 1304 * @skb: The received packet 1305 * @netdev: The net device that the packet was received on 1306 * @ptype: The packet type context 1307 * @olddev: The last device net device 1308 * 1309 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a 1310 * FC frame and passes the frame to libfc. 1311 * 1312 * Returns: 0 for success 1313 */ 1314static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev, 1315 struct packet_type *ptype, struct net_device *olddev) 1316{ 1317 struct fc_lport *lport; 1318 struct fcoe_rcv_info *fr; 1319 struct fcoe_ctlr *ctlr; 1320 struct fcoe_interface *fcoe; 1321 struct fc_frame_header *fh; 1322 struct fcoe_percpu_s *fps; 1323 struct ethhdr *eh; 1324 unsigned int cpu; 1325 1326 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type); 1327 ctlr = fcoe_to_ctlr(fcoe); 1328 lport = ctlr->lp; 1329 if (unlikely(!lport)) { 1330 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n"); 1331 goto err2; 1332 } 1333 if (!lport->link_up) 1334 goto err2; 1335 1336 FCOE_NETDEV_DBG(netdev, 1337 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1338 skb->len, skb->data_len, skb->head, skb->data, 1339 skb_tail_pointer(skb), skb_end_pointer(skb), 1340 skb->csum, skb->dev ? skb->dev->name : "<NULL>"); 1341 1342 1343 skb = skb_share_check(skb, GFP_ATOMIC); 1344 1345 if (skb == NULL) 1346 return NET_RX_DROP; 1347 1348 eh = eth_hdr(skb); 1349 1350 if (is_fip_mode(ctlr) && 1351 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) { 1352 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n", 1353 eh->h_source); 1354 goto err; 1355 } 1356 1357 /* 1358 * Check for minimum frame length, and make sure required FCoE 1359 * and FC headers are pulled into the linear data area. 1360 */ 1361 if (unlikely((skb->len < FCOE_MIN_FRAME) || 1362 !pskb_may_pull(skb, FCOE_HEADER_LEN))) 1363 goto err; 1364 1365 skb_set_transport_header(skb, sizeof(struct fcoe_hdr)); 1366 fh = (struct fc_frame_header *) skb_transport_header(skb); 1367 1368 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) { 1369 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n", 1370 eh->h_dest); 1371 goto err; 1372 } 1373 1374 fr = fcoe_dev_from_skb(skb); 1375 fr->fr_dev = lport; 1376 1377 /* 1378 * In case the incoming frame's exchange is originated from 1379 * the initiator, then received frame's exchange id is ANDed 1380 * with fc_cpu_mask bits to get the same cpu on which exchange 1381 * was originated, otherwise select cpu using rx exchange id 1382 * or fcoe_select_cpu(). 1383 */ 1384 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX) 1385 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask; 1386 else { 1387 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN) 1388 cpu = skb->alloc_cpu; 1389 else 1390 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask; 1391 } 1392 1393 if (cpu >= nr_cpu_ids) 1394 goto err; 1395 1396 fps = &per_cpu(fcoe_percpu, cpu); 1397 spin_lock(&fps->fcoe_rx_list.lock); 1398 /* 1399 * We now have a valid CPU that we're targeting for 1400 * this skb. We also have this receive thread locked, 1401 * so we're free to queue skbs into it's queue. 1402 */ 1403 1404 /* 1405 * Note: We used to have a set of conditions under which we would 1406 * call fcoe_recv_frame directly, rather than queuing to the rx list 1407 * as it could save a few cycles, but doing so is prohibited, as 1408 * fcoe_recv_frame has several paths that may sleep, which is forbidden 1409 * in softirq context. 1410 */ 1411 __skb_queue_tail(&fps->fcoe_rx_list, skb); 1412 schedule_work_on(cpu, &fps->work); 1413 spin_unlock(&fps->fcoe_rx_list.lock); 1414 1415 return NET_RX_SUCCESS; 1416err: 1417 this_cpu_inc(lport->stats->ErrorFrames); 1418err2: 1419 kfree_skb(skb); 1420 return NET_RX_DROP; 1421} 1422 1423/** 1424 * fcoe_alloc_paged_crc_eof() - Allocate a page to be used for the trailer CRC 1425 * @skb: The packet to be transmitted 1426 * @tlen: The total length of the trailer 1427 * 1428 * Returns: 0 for success 1429 */ 1430static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen) 1431{ 1432 struct fcoe_percpu_s *fps; 1433 int rc; 1434 1435 local_lock(&fcoe_percpu.lock); 1436 fps = this_cpu_ptr(&fcoe_percpu); 1437 rc = fcoe_get_paged_crc_eof(skb, tlen, fps); 1438 local_unlock(&fcoe_percpu.lock); 1439 1440 return rc; 1441} 1442 1443/** 1444 * fcoe_xmit() - Transmit a FCoE frame 1445 * @lport: The local port that the frame is to be transmitted for 1446 * @fp: The frame to be transmitted 1447 * 1448 * Return: 0 for success 1449 */ 1450static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp) 1451{ 1452 int wlen; 1453 u32 crc; 1454 struct ethhdr *eh; 1455 struct fcoe_crc_eof *cp; 1456 struct sk_buff *skb; 1457 struct fc_frame_header *fh; 1458 unsigned int hlen; /* header length implies the version */ 1459 unsigned int tlen; /* trailer length */ 1460 unsigned int elen; /* eth header, may include vlan */ 1461 struct fcoe_port *port = lport_priv(lport); 1462 struct fcoe_interface *fcoe = port->priv; 1463 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 1464 u8 sof, eof; 1465 struct fcoe_hdr *hp; 1466 1467 WARN_ON((fr_len(fp) % sizeof(u32)) != 0); 1468 1469 fh = fc_frame_header_get(fp); 1470 skb = fp_skb(fp); 1471 1472 if (!lport->link_up) { 1473 kfree_skb(skb); 1474 return 0; 1475 } 1476 1477 if (unlikely(fh->fh_type == FC_TYPE_ELS) && 1478 fcoe_ctlr_els_send(ctlr, lport, skb)) 1479 return 0; 1480 1481 sof = fr_sof(fp); 1482 eof = fr_eof(fp); 1483 1484 elen = sizeof(struct ethhdr); 1485 hlen = sizeof(struct fcoe_hdr); 1486 tlen = sizeof(struct fcoe_crc_eof); 1487 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE; 1488 1489 /* crc offload */ 1490 if (likely(lport->crc_offload)) { 1491 skb->ip_summed = CHECKSUM_PARTIAL; 1492 skb->csum_start = skb_headroom(skb); 1493 skb->csum_offset = skb->len; 1494 crc = 0; 1495 } else { 1496 skb->ip_summed = CHECKSUM_NONE; 1497 crc = fcoe_fc_crc(fp); 1498 } 1499 1500 /* copy port crc and eof to the skb buff */ 1501 if (skb_is_nonlinear(skb)) { 1502 skb_frag_t *frag; 1503 if (fcoe_alloc_paged_crc_eof(skb, tlen)) { 1504 kfree_skb(skb); 1505 return -ENOMEM; 1506 } 1507 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1]; 1508 cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag); 1509 } else { 1510 cp = skb_put(skb, tlen); 1511 } 1512 1513 memset(cp, 0, sizeof(*cp)); 1514 cp->fcoe_eof = eof; 1515 cp->fcoe_crc32 = cpu_to_le32(~crc); 1516 1517 if (skb_is_nonlinear(skb)) { 1518 kunmap_atomic(cp); 1519 cp = NULL; 1520 } 1521 1522 /* adjust skb network/transport offsets to match mac/fcoe/port */ 1523 skb_push(skb, elen + hlen); 1524 skb_reset_mac_header(skb); 1525 skb_reset_network_header(skb); 1526 skb->mac_len = elen; 1527 skb->protocol = htons(ETH_P_FCOE); 1528 skb->priority = fcoe->priority; 1529 1530 if (is_vlan_dev(fcoe->netdev) && 1531 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) { 1532 /* must set skb->dev before calling vlan_put_tag */ 1533 skb->dev = fcoe->realdev; 1534 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 1535 vlan_dev_vlan_id(fcoe->netdev)); 1536 } else 1537 skb->dev = fcoe->netdev; 1538 1539 /* fill up mac and fcoe headers */ 1540 eh = eth_hdr(skb); 1541 eh->h_proto = htons(ETH_P_FCOE); 1542 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN); 1543 if (ctlr->map_dest) 1544 memcpy(eh->h_dest + 3, fh->fh_d_id, 3); 1545 1546 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN)) 1547 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN); 1548 else 1549 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN); 1550 1551 hp = (struct fcoe_hdr *)(eh + 1); 1552 memset(hp, 0, sizeof(*hp)); 1553 if (FC_FCOE_VER) 1554 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER); 1555 hp->fcoe_sof = sof; 1556 1557 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */ 1558 if (lport->seq_offload && fr_max_payload(fp)) { 1559 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE; 1560 skb_shinfo(skb)->gso_size = fr_max_payload(fp); 1561 } else { 1562 skb_shinfo(skb)->gso_type = 0; 1563 skb_shinfo(skb)->gso_size = 0; 1564 } 1565 /* update tx stats: regardless if LLD fails */ 1566 this_cpu_inc(lport->stats->TxFrames); 1567 this_cpu_add(lport->stats->TxWords, wlen); 1568 1569 /* send down to lld */ 1570 fr_dev(fp) = lport; 1571 fcoe_port_send(port, skb); 1572 return 0; 1573} 1574 1575/** 1576 * fcoe_filter_frames() - filter out bad fcoe frames, i.e. bad CRC 1577 * @lport: The local port the frame was received on 1578 * @fp: The received frame 1579 * 1580 * Return: 0 on passing filtering checks 1581 */ 1582static inline int fcoe_filter_frames(struct fc_lport *lport, 1583 struct fc_frame *fp) 1584{ 1585 struct fcoe_ctlr *ctlr; 1586 struct fcoe_interface *fcoe; 1587 struct fc_frame_header *fh; 1588 struct sk_buff *skb = (struct sk_buff *)fp; 1589 1590 /* 1591 * We only check CRC if no offload is available and if it is 1592 * it's solicited data, in which case, the FCP layer would 1593 * check it during the copy. 1594 */ 1595 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY) 1596 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1597 else 1598 fr_flags(fp) |= FCPHF_CRC_UNCHECKED; 1599 1600 fh = fc_frame_header_get(fp); 1601 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP) 1602 return 0; 1603 1604 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv; 1605 ctlr = fcoe_to_ctlr(fcoe); 1606 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO && 1607 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) { 1608 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n"); 1609 return -EINVAL; 1610 } 1611 1612 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) || 1613 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) { 1614 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED; 1615 return 0; 1616 } 1617 1618 if (this_cpu_inc_return(lport->stats->InvalidCRCCount) < 5) 1619 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n"); 1620 return -EINVAL; 1621} 1622 1623/** 1624 * fcoe_recv_frame() - process a single received frame 1625 * @skb: frame to process 1626 */ 1627static void fcoe_recv_frame(struct sk_buff *skb) 1628{ 1629 u32 fr_len; 1630 struct fc_lport *lport; 1631 struct fcoe_rcv_info *fr; 1632 struct fcoe_crc_eof crc_eof; 1633 struct fc_frame *fp; 1634 struct fcoe_hdr *hp; 1635 1636 fr = fcoe_dev_from_skb(skb); 1637 lport = fr->fr_dev; 1638 if (unlikely(!lport)) { 1639 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n"); 1640 kfree_skb(skb); 1641 return; 1642 } 1643 1644 FCOE_NETDEV_DBG(skb->dev, 1645 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n", 1646 skb->len, skb->data_len, 1647 skb->head, skb->data, skb_tail_pointer(skb), 1648 skb_end_pointer(skb), skb->csum, 1649 skb->dev ? skb->dev->name : "<NULL>"); 1650 1651 skb_linearize(skb); /* check for skb_is_nonlinear is within skb_linearize */ 1652 1653 /* 1654 * Frame length checks and setting up the header pointers 1655 * was done in fcoe_rcv already. 1656 */ 1657 hp = (struct fcoe_hdr *) skb_network_header(skb); 1658 1659 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) { 1660 struct fc_stats *stats; 1661 1662 stats = per_cpu_ptr(lport->stats, raw_smp_processor_id()); 1663 if (READ_ONCE(stats->ErrorFrames) < 5) 1664 printk(KERN_WARNING "fcoe: FCoE version " 1665 "mismatch: The frame has " 1666 "version %x, but the " 1667 "initiator supports version " 1668 "%x\n", FC_FCOE_DECAPS_VER(hp), 1669 FC_FCOE_VER); 1670 goto drop; 1671 } 1672 1673 skb_pull(skb, sizeof(struct fcoe_hdr)); 1674 fr_len = skb->len - sizeof(struct fcoe_crc_eof); 1675 1676 this_cpu_inc(lport->stats->RxFrames); 1677 this_cpu_add(lport->stats->RxWords, fr_len / FCOE_WORD_TO_BYTE); 1678 1679 fp = (struct fc_frame *)skb; 1680 fc_frame_init(fp); 1681 fr_dev(fp) = lport; 1682 fr_sof(fp) = hp->fcoe_sof; 1683 1684 /* Copy out the CRC and EOF trailer for access */ 1685 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) 1686 goto drop; 1687 fr_eof(fp) = crc_eof.fcoe_eof; 1688 fr_crc(fp) = crc_eof.fcoe_crc32; 1689 if (pskb_trim(skb, fr_len)) 1690 goto drop; 1691 1692 if (!fcoe_filter_frames(lport, fp)) { 1693 fc_exch_recv(lport, fp); 1694 return; 1695 } 1696drop: 1697 this_cpu_inc(lport->stats->ErrorFrames); 1698 kfree_skb(skb); 1699} 1700 1701/** 1702 * fcoe_receive_work() - The per-CPU worker 1703 * @work: The work struct 1704 * 1705 */ 1706static void fcoe_receive_work(struct work_struct *work) 1707{ 1708 struct fcoe_percpu_s *p; 1709 struct sk_buff *skb; 1710 struct sk_buff_head tmp; 1711 1712 p = container_of(work, struct fcoe_percpu_s, work); 1713 skb_queue_head_init(&tmp); 1714 1715 spin_lock_bh(&p->fcoe_rx_list.lock); 1716 skb_queue_splice_init(&p->fcoe_rx_list, &tmp); 1717 spin_unlock_bh(&p->fcoe_rx_list.lock); 1718 1719 if (!skb_queue_len(&tmp)) 1720 return; 1721 1722 while ((skb = __skb_dequeue(&tmp))) 1723 fcoe_recv_frame(skb); 1724} 1725 1726/** 1727 * fcoe_dev_setup() - Setup the link change notification interface 1728 */ 1729static void fcoe_dev_setup(void) 1730{ 1731 register_dcbevent_notifier(&dcb_notifier); 1732 register_netdevice_notifier(&fcoe_notifier); 1733} 1734 1735/** 1736 * fcoe_dev_cleanup() - Cleanup the link change notification interface 1737 */ 1738static void fcoe_dev_cleanup(void) 1739{ 1740 unregister_dcbevent_notifier(&dcb_notifier); 1741 unregister_netdevice_notifier(&fcoe_notifier); 1742} 1743 1744static struct fcoe_interface * 1745fcoe_hostlist_lookup_realdev_port(struct net_device *netdev) 1746{ 1747 struct fcoe_interface *fcoe; 1748 struct net_device *real_dev; 1749 1750 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1751 if (is_vlan_dev(fcoe->netdev)) 1752 real_dev = vlan_dev_real_dev(fcoe->netdev); 1753 else 1754 real_dev = fcoe->netdev; 1755 1756 if (netdev == real_dev) 1757 return fcoe; 1758 } 1759 return NULL; 1760} 1761 1762static int fcoe_dcb_app_notification(struct notifier_block *notifier, 1763 ulong event, void *ptr) 1764{ 1765 struct dcb_app_type *entry = ptr; 1766 struct fcoe_ctlr *ctlr; 1767 struct fcoe_interface *fcoe; 1768 struct net_device *netdev; 1769 int prio; 1770 1771 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE) 1772 return NOTIFY_OK; 1773 1774 netdev = dev_get_by_index(&init_net, entry->ifindex); 1775 if (!netdev) 1776 return NOTIFY_OK; 1777 1778 fcoe = fcoe_hostlist_lookup_realdev_port(netdev); 1779 dev_put(netdev); 1780 if (!fcoe) 1781 return NOTIFY_OK; 1782 1783 ctlr = fcoe_to_ctlr(fcoe); 1784 1785 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE) 1786 prio = ffs(entry->app.priority) - 1; 1787 else 1788 prio = entry->app.priority; 1789 1790 if (prio < 0) 1791 return NOTIFY_OK; 1792 1793 if (entry->app.protocol == ETH_P_FIP || 1794 entry->app.protocol == ETH_P_FCOE) 1795 ctlr->priority = prio; 1796 1797 if (entry->app.protocol == ETH_P_FCOE) 1798 fcoe->priority = prio; 1799 1800 return NOTIFY_OK; 1801} 1802 1803/** 1804 * fcoe_device_notification() - Handler for net device events 1805 * @notifier: The context of the notification 1806 * @event: The type of event 1807 * @ptr: The net device that the event was on 1808 * 1809 * This function is called by the Ethernet driver in case of link change event. 1810 * 1811 * Returns: 0 for success 1812 */ 1813static int fcoe_device_notification(struct notifier_block *notifier, 1814 ulong event, void *ptr) 1815{ 1816 struct fcoe_ctlr_device *cdev; 1817 struct fc_lport *lport = NULL; 1818 struct net_device *netdev = netdev_notifier_info_to_dev(ptr); 1819 struct fcoe_ctlr *ctlr; 1820 struct fcoe_interface *fcoe; 1821 u32 link_possible = 1; 1822 u32 mfs; 1823 int rc = NOTIFY_OK; 1824 1825 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 1826 if (fcoe->netdev == netdev) { 1827 ctlr = fcoe_to_ctlr(fcoe); 1828 lport = ctlr->lp; 1829 break; 1830 } 1831 } 1832 if (!lport) { 1833 rc = NOTIFY_DONE; 1834 goto out; 1835 } 1836 1837 switch (event) { 1838 case NETDEV_DOWN: 1839 case NETDEV_GOING_DOWN: 1840 link_possible = 0; 1841 break; 1842 case NETDEV_UP: 1843 case NETDEV_CHANGE: 1844 break; 1845 case NETDEV_CHANGEMTU: 1846 if (netdev->fcoe_mtu) 1847 break; 1848 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) + 1849 sizeof(struct fcoe_crc_eof)); 1850 if (mfs >= FC_MIN_MAX_FRAME) 1851 fc_set_mfs(lport, mfs); 1852 break; 1853 case NETDEV_REGISTER: 1854 break; 1855 case NETDEV_UNREGISTER: 1856 list_del(&fcoe->list); 1857 fcoe_vport_remove(lport); 1858 mutex_lock(&fcoe_config_mutex); 1859 fcoe_if_destroy(lport); 1860 if (!fcoe->removed) 1861 fcoe_interface_remove(fcoe); 1862 fcoe_interface_cleanup(fcoe); 1863 mutex_unlock(&fcoe_config_mutex); 1864 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr)); 1865 goto out; 1866 case NETDEV_FEAT_CHANGE: 1867 fcoe_netdev_features_change(lport, netdev); 1868 break; 1869 default: 1870 FCOE_NETDEV_DBG(netdev, "Unknown event %ld " 1871 "from netdev netlink\n", event); 1872 } 1873 1874 fcoe_link_speed_update(lport); 1875 1876 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 1877 1878 if (link_possible && !fcoe_link_ok(lport)) { 1879 switch (cdev->enabled) { 1880 case FCOE_CTLR_DISABLED: 1881 pr_info("Link up while interface is disabled.\n"); 1882 break; 1883 case FCOE_CTLR_ENABLED: 1884 case FCOE_CTLR_UNUSED: 1885 fcoe_ctlr_link_up(ctlr); 1886 } 1887 } else if (fcoe_ctlr_link_down(ctlr)) { 1888 switch (cdev->enabled) { 1889 case FCOE_CTLR_DISABLED: 1890 pr_info("Link down while interface is disabled.\n"); 1891 break; 1892 case FCOE_CTLR_ENABLED: 1893 case FCOE_CTLR_UNUSED: 1894 this_cpu_inc(lport->stats->LinkFailureCount); 1895 fcoe_clean_pending_queue(lport); 1896 } 1897 } 1898out: 1899 return rc; 1900} 1901 1902/** 1903 * fcoe_disable() - Disables a FCoE interface 1904 * @netdev : The net_device object the Ethernet interface to create on 1905 * 1906 * Called from fcoe transport. 1907 * 1908 * Returns: 0 for success 1909 * 1910 * Deprecated: use fcoe_ctlr_enabled() 1911 */ 1912static int fcoe_disable(struct net_device *netdev) 1913{ 1914 struct fcoe_ctlr *ctlr; 1915 struct fcoe_interface *fcoe; 1916 int rc = 0; 1917 1918 mutex_lock(&fcoe_config_mutex); 1919 1920 rtnl_lock(); 1921 fcoe = fcoe_hostlist_lookup_port(netdev); 1922 rtnl_unlock(); 1923 1924 if (fcoe) { 1925 ctlr = fcoe_to_ctlr(fcoe); 1926 fcoe_ctlr_link_down(ctlr); 1927 fcoe_clean_pending_queue(ctlr->lp); 1928 } else 1929 rc = -ENODEV; 1930 1931 mutex_unlock(&fcoe_config_mutex); 1932 return rc; 1933} 1934 1935/** 1936 * fcoe_enable() - Enables a FCoE interface 1937 * @netdev : The net_device object the Ethernet interface to create on 1938 * 1939 * Called from fcoe transport. 1940 * 1941 * Returns: 0 for success 1942 */ 1943static int fcoe_enable(struct net_device *netdev) 1944{ 1945 struct fcoe_ctlr *ctlr; 1946 struct fcoe_interface *fcoe; 1947 int rc = 0; 1948 1949 mutex_lock(&fcoe_config_mutex); 1950 rtnl_lock(); 1951 fcoe = fcoe_hostlist_lookup_port(netdev); 1952 rtnl_unlock(); 1953 1954 if (!fcoe) { 1955 rc = -ENODEV; 1956 goto out; 1957 } 1958 1959 ctlr = fcoe_to_ctlr(fcoe); 1960 1961 if (!fcoe_link_ok(ctlr->lp)) 1962 fcoe_ctlr_link_up(ctlr); 1963 1964out: 1965 mutex_unlock(&fcoe_config_mutex); 1966 return rc; 1967} 1968 1969/** 1970 * fcoe_ctlr_enabled() - Enable or disable an FCoE Controller 1971 * @cdev: The FCoE Controller that is being enabled or disabled 1972 * 1973 * fcoe_sysfs will ensure that the state of 'enabled' has 1974 * changed, so no checking is necessary here. This routine simply 1975 * calls fcoe_enable or fcoe_disable, both of which are deprecated. 1976 * When those routines are removed the functionality can be merged 1977 * here. 1978 */ 1979static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev) 1980{ 1981 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev); 1982 struct fc_lport *lport = ctlr->lp; 1983 struct net_device *netdev = fcoe_netdev(lport); 1984 1985 switch (cdev->enabled) { 1986 case FCOE_CTLR_ENABLED: 1987 return fcoe_enable(netdev); 1988 case FCOE_CTLR_DISABLED: 1989 return fcoe_disable(netdev); 1990 case FCOE_CTLR_UNUSED: 1991 default: 1992 return -ENOTSUPP; 1993 } 1994} 1995 1996/** 1997 * fcoe_ctlr_mode() - Switch FIP mode 1998 * @ctlr_dev: The FCoE Controller that is being modified 1999 * 2000 * When the FIP mode has been changed we need to update 2001 * the multicast addresses to ensure we get the correct 2002 * frames. 2003 */ 2004static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev) 2005{ 2006 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2007 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2008 2009 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN && 2010 ctlr->mode != FIP_MODE_VN2VN) { 2011 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS); 2012 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2013 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS); 2014 } else if (ctlr->mode != FIP_MODE_FABRIC) { 2015 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS); 2016 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS); 2017 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS); 2018 } 2019 fcoe_ctlr_set_fip_mode(ctlr_dev); 2020} 2021 2022/** 2023 * fcoe_destroy() - Destroy a FCoE interface 2024 * @netdev : The net_device object the Ethernet interface to create on 2025 * 2026 * Called from fcoe transport 2027 * 2028 * Returns: 0 for success 2029 */ 2030static int fcoe_destroy(struct net_device *netdev) 2031{ 2032 struct fcoe_ctlr *ctlr; 2033 struct fcoe_interface *fcoe; 2034 struct fc_lport *lport; 2035 struct fcoe_port *port; 2036 int rc = 0; 2037 2038 mutex_lock(&fcoe_config_mutex); 2039 rtnl_lock(); 2040 fcoe = fcoe_hostlist_lookup_port(netdev); 2041 if (!fcoe) { 2042 rc = -ENODEV; 2043 goto out_nodev; 2044 } 2045 ctlr = fcoe_to_ctlr(fcoe); 2046 lport = ctlr->lp; 2047 port = lport_priv(lport); 2048 list_del(&fcoe->list); 2049 queue_work(fcoe_wq, &port->destroy_work); 2050out_nodev: 2051 rtnl_unlock(); 2052 mutex_unlock(&fcoe_config_mutex); 2053 return rc; 2054} 2055 2056/** 2057 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context 2058 * @work: Handle to the FCoE port to be destroyed 2059 */ 2060static void fcoe_destroy_work(struct work_struct *work) 2061{ 2062 struct fcoe_ctlr_device *cdev; 2063 struct fcoe_ctlr *ctlr; 2064 struct fcoe_port *port; 2065 struct fcoe_interface *fcoe; 2066 2067 port = container_of(work, struct fcoe_port, destroy_work); 2068 2069 fcoe_vport_remove(port->lport); 2070 2071 mutex_lock(&fcoe_config_mutex); 2072 2073 fcoe = port->priv; 2074 ctlr = fcoe_to_ctlr(fcoe); 2075 cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2076 2077 rtnl_lock(); 2078 fcoe_if_destroy(port->lport); 2079 if (!fcoe->removed) 2080 fcoe_interface_remove(fcoe); 2081 rtnl_unlock(); 2082 fcoe_interface_cleanup(fcoe); 2083 2084 mutex_unlock(&fcoe_config_mutex); 2085 2086 fcoe_ctlr_device_delete(cdev); 2087} 2088 2089/** 2090 * fcoe_match() - Check if the FCoE is supported on the given netdevice 2091 * @netdev : The net_device object the Ethernet interface to create on 2092 * 2093 * Called from fcoe transport. 2094 * 2095 * Returns: always returns true as this is the default FCoE transport, 2096 * i.e., support all netdevs. 2097 */ 2098static bool fcoe_match(struct net_device *netdev) 2099{ 2100 return true; 2101} 2102 2103/** 2104 * fcoe_dcb_create() - Initialize DCB attributes and hooks 2105 * @fcoe: The new FCoE interface 2106 */ 2107static void fcoe_dcb_create(struct fcoe_interface *fcoe) 2108{ 2109 int ctlr_prio = TC_PRIO_BESTEFFORT; 2110 int fcoe_prio = TC_PRIO_INTERACTIVE; 2111 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2112#ifdef CONFIG_DCB 2113 int dcbx; 2114 u8 fup, up; 2115 struct net_device *netdev = fcoe->realdev; 2116 struct dcb_app app = { 2117 .priority = 0, 2118 .protocol = ETH_P_FCOE 2119 }; 2120 2121 /* setup DCB priority attributes. */ 2122 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) { 2123 dcbx = netdev->dcbnl_ops->getdcbx(netdev); 2124 2125 if (dcbx & DCB_CAP_DCBX_VER_IEEE) { 2126 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE; 2127 up = dcb_ieee_getapp_mask(netdev, &app); 2128 app.protocol = ETH_P_FIP; 2129 fup = dcb_ieee_getapp_mask(netdev, &app); 2130 } else { 2131 app.selector = DCB_APP_IDTYPE_ETHTYPE; 2132 up = dcb_getapp(netdev, &app); 2133 app.protocol = ETH_P_FIP; 2134 fup = dcb_getapp(netdev, &app); 2135 } 2136 2137 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0; 2138 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio; 2139 } 2140#endif 2141 fcoe->priority = fcoe_prio; 2142 ctlr->priority = ctlr_prio; 2143} 2144 2145enum fcoe_create_link_state { 2146 FCOE_CREATE_LINK_DOWN, 2147 FCOE_CREATE_LINK_UP, 2148}; 2149 2150/** 2151 * _fcoe_create() - (internal) Create a fcoe interface 2152 * @netdev : The net_device object the Ethernet interface to create on 2153 * @fip_mode: The FIP mode for this creation 2154 * @link_state: The ctlr link state on creation 2155 * 2156 * Called from either the libfcoe 'create' module parameter 2157 * via fcoe_create or from fcoe_syfs's ctlr_create file. 2158 * 2159 * libfcoe's 'create' module parameter is deprecated so some 2160 * consolidation of code can be done when that interface is 2161 * removed. 2162 */ 2163static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode, 2164 enum fcoe_create_link_state link_state) 2165{ 2166 int rc = 0; 2167 struct fcoe_ctlr_device *ctlr_dev; 2168 struct fcoe_ctlr *ctlr; 2169 struct fcoe_interface *fcoe; 2170 struct fc_lport *lport; 2171 2172 mutex_lock(&fcoe_config_mutex); 2173 rtnl_lock(); 2174 2175 /* look for existing lport */ 2176 if (fcoe_hostlist_lookup(netdev)) { 2177 rc = -EEXIST; 2178 goto out_nodev; 2179 } 2180 2181 fcoe = fcoe_interface_create(netdev, fip_mode); 2182 if (IS_ERR(fcoe)) { 2183 rc = PTR_ERR(fcoe); 2184 goto out_nodev; 2185 } 2186 2187 ctlr = fcoe_to_ctlr(fcoe); 2188 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr); 2189 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0); 2190 if (IS_ERR(lport)) { 2191 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n", 2192 netdev->name); 2193 rc = -EIO; 2194 if (!fcoe->removed) 2195 fcoe_interface_remove(fcoe); 2196 rtnl_unlock(); 2197 fcoe_interface_cleanup(fcoe); 2198 mutex_unlock(&fcoe_config_mutex); 2199 fcoe_ctlr_device_delete(ctlr_dev); 2200 return rc; 2201 } 2202 2203 /* Make this the "master" N_Port */ 2204 ctlr->lp = lport; 2205 2206 /* setup DCB priority attributes. */ 2207 fcoe_dcb_create(fcoe); 2208 2209 /* start FIP Discovery and FLOGI */ 2210 lport->boot_time = jiffies; 2211 fc_fabric_login(lport); 2212 2213 /* 2214 * If the fcoe_ctlr_device is to be set to DISABLED 2215 * it must be done after the lport is added to the 2216 * hostlist, but before the rtnl_lock is released. 2217 * This is because the rtnl_lock protects the 2218 * hostlist that fcoe_device_notification uses. If 2219 * the FCoE Controller is intended to be created 2220 * DISABLED then 'enabled' needs to be considered 2221 * handling link events. 'enabled' must be set 2222 * before the lport can be found in the hostlist 2223 * when a link up event is received. 2224 */ 2225 if (link_state == FCOE_CREATE_LINK_UP) 2226 ctlr_dev->enabled = FCOE_CTLR_ENABLED; 2227 else 2228 ctlr_dev->enabled = FCOE_CTLR_DISABLED; 2229 2230 if (link_state == FCOE_CREATE_LINK_UP && 2231 !fcoe_link_ok(lport)) { 2232 rtnl_unlock(); 2233 fcoe_ctlr_link_up(ctlr); 2234 mutex_unlock(&fcoe_config_mutex); 2235 return rc; 2236 } 2237 2238out_nodev: 2239 rtnl_unlock(); 2240 mutex_unlock(&fcoe_config_mutex); 2241 2242 return rc; 2243} 2244 2245/** 2246 * fcoe_create() - Create a fcoe interface 2247 * @netdev : The net_device object the Ethernet interface to create on 2248 * @fip_mode: The FIP mode for this creation 2249 * 2250 * Called from fcoe transport 2251 * 2252 * Returns: 0 for success 2253 */ 2254static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode) 2255{ 2256 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP); 2257} 2258 2259/** 2260 * fcoe_ctlr_alloc() - Allocate a fcoe interface from fcoe_sysfs 2261 * @netdev: The net_device to be used by the allocated FCoE Controller 2262 * 2263 * This routine is called from fcoe_sysfs. It will start the fcoe_ctlr 2264 * in a link_down state. The allows the user an opportunity to configure 2265 * the FCoE Controller from sysfs before enabling the FCoE Controller. 2266 * 2267 * Creating in with this routine starts the FCoE Controller in Fabric 2268 * mode. The user can change to VN2VN or another mode before enabling. 2269 */ 2270static int fcoe_ctlr_alloc(struct net_device *netdev) 2271{ 2272 return _fcoe_create(netdev, FIP_MODE_FABRIC, 2273 FCOE_CREATE_LINK_DOWN); 2274} 2275 2276/** 2277 * fcoe_link_ok() - Check if the link is OK for a local port 2278 * @lport: The local port to check link on 2279 * 2280 * Returns: 0 if link is UP and OK, -1 if not 2281 * 2282 */ 2283static int fcoe_link_ok(struct fc_lport *lport) 2284{ 2285 struct net_device *netdev = fcoe_netdev(lport); 2286 2287 if (netif_oper_up(netdev)) 2288 return 0; 2289 return -1; 2290} 2291 2292/** 2293 * fcoe_percpu_clean() - Clear all pending skbs for an local port 2294 * @lport: The local port whose skbs are to be cleared 2295 * 2296 * Must be called with fcoe_create_mutex held to single-thread completion. 2297 * 2298 * This flushes the pending skbs by flush the work item for each CPU. The work 2299 * item on each possible CPU is flushed because we may have used the per-CPU 2300 * struct of an offline CPU. 2301 */ 2302static void fcoe_percpu_clean(struct fc_lport *lport) 2303{ 2304 struct fcoe_percpu_s *pp; 2305 unsigned int cpu; 2306 2307 for_each_possible_cpu(cpu) { 2308 pp = &per_cpu(fcoe_percpu, cpu); 2309 2310 flush_work(&pp->work); 2311 } 2312} 2313 2314/** 2315 * fcoe_reset() - Reset a local port 2316 * @shost: The SCSI host associated with the local port to be reset 2317 * 2318 * Returns: Always 0 (return value required by FC transport template) 2319 */ 2320static int fcoe_reset(struct Scsi_Host *shost) 2321{ 2322 struct fc_lport *lport = shost_priv(shost); 2323 struct fcoe_port *port = lport_priv(lport); 2324 struct fcoe_interface *fcoe = port->priv; 2325 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2326 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr); 2327 2328 fcoe_ctlr_link_down(ctlr); 2329 fcoe_clean_pending_queue(ctlr->lp); 2330 2331 if (cdev->enabled != FCOE_CTLR_DISABLED && 2332 !fcoe_link_ok(ctlr->lp)) 2333 fcoe_ctlr_link_up(ctlr); 2334 return 0; 2335} 2336 2337/** 2338 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device 2339 * @netdev: The net device used as a key 2340 * 2341 * Locking: Must be called with the RNL mutex held. 2342 * 2343 * Returns: NULL or the FCoE interface 2344 */ 2345static struct fcoe_interface * 2346fcoe_hostlist_lookup_port(const struct net_device *netdev) 2347{ 2348 struct fcoe_interface *fcoe; 2349 2350 list_for_each_entry(fcoe, &fcoe_hostlist, list) { 2351 if (fcoe->netdev == netdev) 2352 return fcoe; 2353 } 2354 return NULL; 2355} 2356 2357/** 2358 * fcoe_hostlist_lookup() - Find the local port associated with a 2359 * given net device 2360 * @netdev: The netdevice used as a key 2361 * 2362 * Locking: Must be called with the RTNL mutex held 2363 * 2364 * Returns: NULL or the local port 2365 */ 2366static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev) 2367{ 2368 struct fcoe_ctlr *ctlr; 2369 struct fcoe_interface *fcoe; 2370 2371 fcoe = fcoe_hostlist_lookup_port(netdev); 2372 ctlr = fcoe_to_ctlr(fcoe); 2373 return (fcoe) ? ctlr->lp : NULL; 2374} 2375 2376/** 2377 * fcoe_hostlist_add() - Add the FCoE interface identified by a local 2378 * port to the hostlist 2379 * @lport: The local port that identifies the FCoE interface to be added 2380 * 2381 * Locking: must be called with the RTNL mutex held 2382 * 2383 * Returns: 0 for success 2384 */ 2385static int fcoe_hostlist_add(const struct fc_lport *lport) 2386{ 2387 struct fcoe_interface *fcoe; 2388 struct fcoe_port *port; 2389 2390 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport)); 2391 if (!fcoe) { 2392 port = lport_priv(lport); 2393 fcoe = port->priv; 2394 list_add_tail(&fcoe->list, &fcoe_hostlist); 2395 } 2396 return 0; 2397} 2398 2399/** 2400 * fcoe_hostlist_del() - Remove the FCoE interface identified by a local 2401 * port to the hostlist 2402 * @lport: The local port that identifies the FCoE interface to be added 2403 * 2404 * Locking: must be called with the RTNL mutex held 2405 * 2406 */ 2407static void fcoe_hostlist_del(const struct fc_lport *lport) 2408{ 2409 struct fcoe_interface *fcoe; 2410 struct fcoe_port *port; 2411 2412 port = lport_priv(lport); 2413 fcoe = port->priv; 2414 list_del(&fcoe->list); 2415 return; 2416} 2417 2418static struct fcoe_transport fcoe_sw_transport = { 2419 .name = {FCOE_TRANSPORT_DEFAULT}, 2420 .attached = false, 2421 .list = LIST_HEAD_INIT(fcoe_sw_transport.list), 2422 .match = fcoe_match, 2423 .alloc = fcoe_ctlr_alloc, 2424 .create = fcoe_create, 2425 .destroy = fcoe_destroy, 2426 .enable = fcoe_enable, 2427 .disable = fcoe_disable, 2428}; 2429 2430/** 2431 * fcoe_init() - Initialize fcoe.ko 2432 * 2433 * Returns: 0 on success, or a negative value on failure 2434 */ 2435static int __init fcoe_init(void) 2436{ 2437 struct fcoe_percpu_s *p; 2438 unsigned int cpu; 2439 int rc = 0; 2440 2441 fcoe_wq = alloc_workqueue("fcoe", WQ_PERCPU, 0); 2442 if (!fcoe_wq) 2443 return -ENOMEM; 2444 2445 /* register as a fcoe transport */ 2446 rc = fcoe_transport_attach(&fcoe_sw_transport); 2447 if (rc) { 2448 printk(KERN_ERR "failed to register an fcoe transport, check " 2449 "if libfcoe is loaded\n"); 2450 goto out_destroy; 2451 } 2452 2453 mutex_lock(&fcoe_config_mutex); 2454 2455 for_each_possible_cpu(cpu) { 2456 p = per_cpu_ptr(&fcoe_percpu, cpu); 2457 INIT_WORK(&p->work, fcoe_receive_work); 2458 skb_queue_head_init(&p->fcoe_rx_list); 2459 local_lock_init(&p->lock); 2460 } 2461 2462 /* Setup link change notification */ 2463 fcoe_dev_setup(); 2464 2465 rc = fcoe_if_init(); 2466 if (rc) 2467 goto out_free; 2468 2469 mutex_unlock(&fcoe_config_mutex); 2470 return 0; 2471 2472out_free: 2473 mutex_unlock(&fcoe_config_mutex); 2474 fcoe_transport_detach(&fcoe_sw_transport); 2475out_destroy: 2476 destroy_workqueue(fcoe_wq); 2477 return rc; 2478} 2479module_init(fcoe_init); 2480 2481/** 2482 * fcoe_exit() - Clean up fcoe.ko 2483 * 2484 * Returns: 0 on success or a negative value on failure 2485 */ 2486static void __exit fcoe_exit(void) 2487{ 2488 struct fcoe_interface *fcoe, *tmp; 2489 struct fcoe_ctlr *ctlr; 2490 struct fcoe_port *port; 2491 unsigned int cpu; 2492 2493 mutex_lock(&fcoe_config_mutex); 2494 2495 fcoe_dev_cleanup(); 2496 2497 /* releases the associated fcoe hosts */ 2498 rtnl_lock(); 2499 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) { 2500 ctlr = fcoe_to_ctlr(fcoe); 2501 port = lport_priv(ctlr->lp); 2502 fcoe_hostlist_del(port->lport); 2503 queue_work(fcoe_wq, &port->destroy_work); 2504 } 2505 rtnl_unlock(); 2506 2507 for_each_possible_cpu(cpu) 2508 fcoe_thread_cleanup_local(cpu); 2509 2510 mutex_unlock(&fcoe_config_mutex); 2511 2512 /* 2513 * destroy_work's may be chained but destroy_workqueue() 2514 * can take care of them. Just kill the fcoe_wq. 2515 */ 2516 destroy_workqueue(fcoe_wq); 2517 2518 /* 2519 * Detaching from the scsi transport must happen after all 2520 * destroys are done on the fcoe_wq. destroy_workqueue will 2521 * enusre the fcoe_wq is flushed. 2522 */ 2523 fcoe_if_exit(); 2524 2525 /* detach from fcoe transport */ 2526 fcoe_transport_detach(&fcoe_sw_transport); 2527} 2528module_exit(fcoe_exit); 2529 2530/** 2531 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler 2532 * @seq: active sequence in the FLOGI or FDISC exchange 2533 * @fp: response frame, or error encoded in a pointer (timeout) 2534 * @arg: pointer to the fcoe_ctlr structure 2535 * 2536 * This handles MAC address management for FCoE, then passes control on to 2537 * the libfc FLOGI response handler. 2538 */ 2539static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2540{ 2541 struct fcoe_ctlr *fip = arg; 2542 struct fc_exch *exch = fc_seq_exch(seq); 2543 struct fc_lport *lport = exch->lp; 2544 u8 *mac; 2545 2546 if (IS_ERR(fp)) 2547 goto done; 2548 2549 mac = fr_cb(fp)->granted_mac; 2550 /* pre-FIP */ 2551 if (is_zero_ether_addr(mac)) 2552 fcoe_ctlr_recv_flogi(fip, lport, fp); 2553 else 2554 fcoe_update_src_mac(lport, mac); 2555done: 2556 fc_lport_flogi_resp(seq, fp, lport); 2557} 2558 2559/** 2560 * fcoe_logo_resp() - FCoE specific LOGO response handler 2561 * @seq: active sequence in the LOGO exchange 2562 * @fp: response frame, or error encoded in a pointer (timeout) 2563 * @arg: pointer to the fcoe_ctlr structure 2564 * 2565 * This handles MAC address management for FCoE, then passes control on to 2566 * the libfc LOGO response handler. 2567 */ 2568static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg) 2569{ 2570 struct fc_lport *lport = arg; 2571 static u8 zero_mac[ETH_ALEN] = { 0 }; 2572 2573 if (!IS_ERR(fp)) 2574 fcoe_update_src_mac(lport, zero_mac); 2575 fc_lport_logo_resp(seq, fp, lport); 2576} 2577 2578/* 2579 * fcoe_elsct_send - FCoE specific ELS handler 2580 * 2581 * This does special case handling of FIP encapsualted ELS exchanges for FCoE, 2582 * using FCoE specific response handlers and passing the FIP controller as 2583 * the argument (the lport is still available from the exchange). 2584 * 2585 * Most of the work here is just handed off to the libfc routine. 2586 */ 2587static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did, 2588 struct fc_frame *fp, unsigned int op, 2589 void (*resp)(struct fc_seq *, 2590 struct fc_frame *, 2591 void *), 2592 void *arg, u32 timeout) 2593{ 2594 struct fcoe_port *port = lport_priv(lport); 2595 struct fcoe_interface *fcoe = port->priv; 2596 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe); 2597 struct fc_frame_header *fh = fc_frame_header_get(fp); 2598 2599 switch (op) { 2600 case ELS_FLOGI: 2601 case ELS_FDISC: 2602 if (lport->point_to_multipoint) 2603 break; 2604 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp, 2605 fip, timeout); 2606 case ELS_LOGO: 2607 /* only hook onto fabric logouts, not port logouts */ 2608 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) 2609 break; 2610 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp, 2611 lport, timeout); 2612 } 2613 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout); 2614} 2615 2616/** 2617 * fcoe_vport_create() - create an fc_host/scsi_host for a vport 2618 * @vport: fc_vport object to create a new fc_host for 2619 * @disabled: start the new fc_host in a disabled state by default? 2620 * 2621 * Returns: 0 for success 2622 */ 2623static int fcoe_vport_create(struct fc_vport *vport, bool disabled) 2624{ 2625 struct Scsi_Host *shost = vport_to_shost(vport); 2626 struct fc_lport *n_port = shost_priv(shost); 2627 struct fcoe_port *port = lport_priv(n_port); 2628 struct fcoe_interface *fcoe = port->priv; 2629 struct net_device *netdev = fcoe->netdev; 2630 struct fc_lport *vn_port; 2631 int rc; 2632 char buf[32]; 2633 2634 rc = fcoe_validate_vport_create(vport); 2635 if (rc) { 2636 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf)); 2637 printk(KERN_ERR "fcoe: Failed to create vport, " 2638 "WWPN (0x%s) already exists\n", 2639 buf); 2640 return rc; 2641 } 2642 2643 mutex_lock(&fcoe_config_mutex); 2644 rtnl_lock(); 2645 vn_port = fcoe_if_create(fcoe, &vport->dev, 1); 2646 rtnl_unlock(); 2647 mutex_unlock(&fcoe_config_mutex); 2648 2649 if (IS_ERR(vn_port)) { 2650 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n", 2651 netdev->name); 2652 return -EIO; 2653 } 2654 2655 if (disabled) { 2656 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2657 } else { 2658 vn_port->boot_time = jiffies; 2659 fc_fabric_login(vn_port); 2660 fc_vport_setlink(vn_port); 2661 } 2662 return 0; 2663} 2664 2665/** 2666 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport 2667 * @vport: fc_vport object that is being destroyed 2668 * 2669 * Returns: 0 for success 2670 */ 2671static int fcoe_vport_destroy(struct fc_vport *vport) 2672{ 2673 struct Scsi_Host *shost = vport_to_shost(vport); 2674 struct fc_lport *n_port = shost_priv(shost); 2675 struct fc_lport *vn_port = vport->dd_data; 2676 2677 mutex_lock(&n_port->lp_mutex); 2678 list_del(&vn_port->list); 2679 mutex_unlock(&n_port->lp_mutex); 2680 2681 mutex_lock(&fcoe_config_mutex); 2682 rtnl_lock(); 2683 fcoe_if_destroy(vn_port); 2684 rtnl_unlock(); 2685 mutex_unlock(&fcoe_config_mutex); 2686 2687 return 0; 2688} 2689 2690/** 2691 * fcoe_vport_remove() - remove attached vports 2692 * @lport: lport for which the vports should be removed 2693 */ 2694static void fcoe_vport_remove(struct fc_lport *lport) 2695{ 2696 struct Scsi_Host *shost; 2697 struct fc_host_attrs *fc_host; 2698 unsigned long flags; 2699 struct fc_vport *vport; 2700 struct fc_vport *next_vport; 2701 2702 shost = lport->host; 2703 fc_host = shost_to_fc_host(shost); 2704 2705 /* Loop through all the vports and mark them for deletion */ 2706 spin_lock_irqsave(shost->host_lock, flags); 2707 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) { 2708 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) { 2709 continue; 2710 } else { 2711 vport->flags |= FC_VPORT_DELETING; 2712 queue_work(fc_host_work_q(shost), 2713 &vport->vport_delete_work); 2714 } 2715 } 2716 spin_unlock_irqrestore(shost->host_lock, flags); 2717 2718 flush_workqueue(fc_host_work_q(shost)); 2719} 2720 2721/** 2722 * fcoe_vport_disable() - change vport state 2723 * @vport: vport to bring online/offline 2724 * @disable: should the vport be disabled? 2725 */ 2726static int fcoe_vport_disable(struct fc_vport *vport, bool disable) 2727{ 2728 struct fc_lport *lport = vport->dd_data; 2729 2730 if (disable) { 2731 fc_vport_set_state(vport, FC_VPORT_DISABLED); 2732 fc_fabric_logoff(lport); 2733 } else { 2734 lport->boot_time = jiffies; 2735 fc_fabric_login(lport); 2736 fc_vport_setlink(lport); 2737 } 2738 2739 return 0; 2740} 2741 2742/** 2743 * fcoe_set_vport_symbolic_name() - append vport string to symbolic name 2744 * @vport: fc_vport with a new symbolic name string 2745 * 2746 * After generating a new symbolic name string, a new RSPN_ID request is 2747 * sent to the name server. There is no response handler, so if it fails 2748 * for some reason it will not be retried. 2749 */ 2750static void fcoe_set_vport_symbolic_name(struct fc_vport *vport) 2751{ 2752 struct fc_lport *lport = vport->dd_data; 2753 struct fc_frame *fp; 2754 size_t len; 2755 2756 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE, 2757 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION, 2758 fcoe_netdev(lport)->name, vport->symbolic_name); 2759 2760 if (lport->state != LPORT_ST_READY) 2761 return; 2762 2763 len = strnlen(fc_host_symbolic_name(lport->host), 255); 2764 fp = fc_frame_alloc(lport, 2765 sizeof(struct fc_ct_hdr) + 2766 sizeof(struct fc_ns_rspn) + len); 2767 if (!fp) 2768 return; 2769 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID, 2770 NULL, NULL, 3 * lport->r_a_tov); 2771} 2772 2773static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev) 2774{ 2775 struct fcoe_ctlr_device *ctlr_dev = 2776 fcoe_fcf_dev_to_ctlr_dev(fcf_dev); 2777 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); 2778 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr); 2779 2780 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev); 2781} 2782 2783/** 2784 * fcoe_set_port_id() - Callback from libfc when Port_ID is set. 2785 * @lport: the local port 2786 * @port_id: the port ID 2787 * @fp: the received frame, if any, that caused the port_id to be set. 2788 * 2789 * This routine handles the case where we received a FLOGI and are 2790 * entering point-to-point mode. We need to call fcoe_ctlr_recv_flogi() 2791 * so it can set the non-mapped mode and gateway address. 2792 * 2793 * The FLOGI LS_ACC is handled by fcoe_flogi_resp(). 2794 */ 2795static void fcoe_set_port_id(struct fc_lport *lport, 2796 u32 port_id, struct fc_frame *fp) 2797{ 2798 struct fcoe_port *port = lport_priv(lport); 2799 struct fcoe_interface *fcoe = port->priv; 2800 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe); 2801 2802 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI) 2803 fcoe_ctlr_recv_flogi(ctlr, lport, fp); 2804}
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